Multiquip EM97010 Pilot Relief Cartridge

The Multiquip EM97010 Pilot Relief Cartridge is a genuine OEM component designed for ST-45HRM and ST-70 series concrete pumps. This is a direct-from-Multiquip replacement part, ensuring correct pressure ratings, thread specifications, and material grades that match the original hydraulic circuit design. Sourced through DHS Equipment as an authorized Multiquip parts distributor, the part is the correct choice when overhauling or servicing the hydraulic relief system on your ST-series machine. Confirming your model code before ordering ensures a clean, compatible installation.

Key Features

• Hydraulic-Grade OEM Construction — Built to exact pressure and flow tolerances required by the hydraulic circuit, ensuring the relief valve opens and seats consistently under operating load.
• Drop-In Cartridge Format — Designed to thread directly into the existing valve block port on ST-45HRM and ST-70 concrete pumps with no re-machining or adapter fittings required.
• Confirmed ST-Series Fitment — Compatible with the ST-45HRM and ST-70 swing-tube concrete pump models; verify your model code against EM97010 before ordering.
• Protects Downstream Hydraulic Components — A correctly functioning pilot relief cartridge prevents overpressure events that can damage cylinders, seals, and valve bodies — keeping costly hydraulic repairs off the table.
• Pressure System Safety — In hydraulic concrete pump circuits, a failed or stuck relief cartridge can cause uncontrolled pressure spikes; replacing with a genuine OEM unit restores designed system pressure limits and safe operating conditions.

The pilot relief cartridge is a precision hydraulic valve that regulates pilot circuit pressure within the pump's hydraulic system. It acts as a pressure-limiting device, opening at a set threshold to divert excess fluid and protect sensitive downstream components from overpressure damage. When the cartridge wears, sticks, or fails to seat correctly, the result is erratic pump cycling, loss of hydraulic control response, or pressure-related damage to cylinders and seals — making timely replacement critical to keeping the concrete pump operating safely and efficiently.

Part Details

Compatibility & Fitment

Verify Before You Order

Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.

Why Buy From DHS Equipment

Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.

Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.